Possible alternative hardware with similar features.

Not fully: You can build U-Boot for Marvell DB-88F6820 and you will probably be able to pass into monitor. I am going to send certain portion of the patches to upstream, but since we have quite a lot controversial patches that need heavy cleanup - i.e. BtrFS in U-Boot, I think it will take some time.

The DTS for the board has been sent to ML, but even with the DTS mainline kernel still does not support certain peripherals that required hacks due to either errata (i.e. RTC) or general lack of support in mailine (i.e. SFP cage).

We/I would be grateful if anybody takes our/my code in our (public) repos and clean it to state that it can be submitted to upstream. I wanted to do it before releasing the product, but I am still solving a lot of weird interoperability problems with various SFP modules, PCIe cards etc. instead of working on code cleanup.